The Chinese commodities market experienced a up-and-down trading day on Tuesday as most star commodities lost value.

Iron ore and hot rolled steel both dropped to their lower limits, while rebar fell 3.8 percent. Agricultural futures maintained moderate growth as rapeseed meal and soybean meal increased 1.5 percent and 1.4 percent, respectively. Coke and coking coal rebounded slightly at closing. China's commodities market has seen sharp growth since the beginning of this year. But analysts say the rising prices have been driven mainly by speculation. The commodity exchanges in Dalian, Shanghai and Zhengzhou have increased their trading margins and fees in response to unwarranted surges in prices and volumes.